A Case of Cyperus spp. and Imperata cylindrica Occurrences on Acrisol of the Dahomey Gap in South Benin as Affected by Soil Characteristics: A Strategy for Soil and Weed Management

Table 3

Mean values of clay, silt, Fe, K, and Ca contents in soil at different topographic positions for different abundance of Imperata.

		Clay	Silt	Fe	K	Ca
		%		(ppm)	cmol kg^−1
SUM	A	9^c	5^b	3277.87^b	0.02^b	3.32^a
	M	10^b	6^a	1506.75^c	0.01^c	2.84^b
	H	14^a	6^a	3509.50^a	0.04^a	3.28^a
𝑃>𝐹		<0.0001	0.006	<0.0001	<0.0001	<0.0001
US	A	14^b	5^b	2584.94^a	0.05^b	2.87^a
	M	12^a	4^c	654.08^c	0.03^c	2.90^a
	H	13^b	8^a	2330.99^b	0.08^a	2.88^a
𝑃>𝐹		<0.0001	<0.0001	<0.0001	<0.0001	0.272
MS	A	10^a	4^b	2366.19^a	0.18^c	2.00^c
	M	7^c	5^a	1018.08^c	0.30^a	2.19^b
	H	9^b	3^c	2046.45^b	0.23^b	2.44^a
𝑃>𝐹		<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
FS	A	10^a	9^c	591.65^c	0.36^b	2.87^a
	M	10^a	11^a	4498.86^a	0.41^a	2.02^c
	H	9^b	10^b	1269.39^b	0.21^c	2.25^b
𝑃>𝐹		<0.0001	<0.0001	<0.0001	<0.0001	<0.0001

SUM: Summit; US: upper slope; MS: middle slope; FS: foot slope; A: absent; M: moderate density; H: high density; a,b,care indicating mean values that are significantly different.